Simultaneous Nadir Overpasses (SNOs) between LANDSAT-8 and NPP
TLE Epoch: 2018 1 18.  Predictions up to the next  14.0 days:

     Date     Time(LANDSAT-8) LANDSAT-8 Lat/Lon Date Time(NPP) NPP Lat/Lon    Distance(km)  Time Diff(sec)
 01/19/2018   22:25:19   ( -70.59,  20.77) 01/19/2018   22:24:08  ( -70.62,  19.47)   47.97                71
 01/19/2018   23:14:54   (  70.06,-172.37) 01/19/2018   23:14:44  (  70.09,-172.37)    3.13                10
 01/20/2018   00:04:24   ( -69.94,  -4.90) 01/20/2018   00:05:25  ( -69.95,  -4.84)    2.24                61
 01/22/2018   14:41:54   ( -70.13, 135.98) 01/22/2018   14:40:51  ( -70.13, 136.04)    2.31                63
 01/22/2018   15:31:21   (  70.03, -56.52) 01/22/2018   15:31:35  (  70.01, -56.47)    3.14                14
 01/22/2018   16:20:59   ( -69.48, 110.35) 01/22/2018   16:22:09  ( -69.50, 111.59)   48.45                70
 01/25/2018   06:58:22   ( -70.11,-108.17) 01/25/2018   06:57:44  ( -70.10,-108.15)    1.21                38
 01/25/2018   07:47:49   (  70.00,  59.32) 01/25/2018   07:48:28  (  69.98,  59.34)    1.95                39
 01/27/2018   22:25:14   (  70.51,-159.33) 01/27/2018   22:24:03  (  70.59,-160.45)   42.25                71
 01/27/2018   23:14:50   ( -70.08,   7.66) 01/27/2018   23:14:37  ( -70.08,   7.66)    0.21                13
 01/28/2018   00:04:17   (  69.97, 175.15) 01/28/2018   00:05:21  (  69.96, 175.15)    0.44                64
 01/30/2018   14:41:48   (  70.14, -43.99) 01/30/2018   14:40:48  (  70.15, -43.98)    0.30                60
 01/30/2018   15:31:18   ( -70.04, 123.50) 01/30/2018   15:31:30  ( -70.06, 123.47)    2.04                12
 01/30/2018   16:20:55   (  69.37, -69.77) 01/30/2018   16:22:03  (  69.36, -68.19)   61.92                68